Staff Sgt. Joshua Baldwin, 28th Logistics Readiness Squadron refueling maintenance mechanic, installs a new gasket on a master meter during scheduled maintenance in the fuels shop at Ellsworth Air Force Base, S.D., Oct. 16, 2012. This master meter, in use continuously since 1959, has proven to be extraordinarily cost efficient, requiring only minor repairs and maintenance during its over five decades of service. (U.S. Air Force photo by Airman 1st Class Kate Thornton-Maurer/Released)